package com.mmall.common;


import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * Created by JINPENG on 2018/10/4.
 */
public class TokenCache {
    private  static Logger logger= LoggerFactory.getLogger(TokenCache.class);
    public static final String TOKEN_PREFIX = "token_";
    //LRU算法，移除最少使用算法
    private  static LoadingCache<String,String> localCache = CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000)
            .expireAfterAccess(12, TimeUnit.HOURS).build(new CacheLoader<String, String>() {
                //默认的数据加载实现，当调用get取值的时候，如果KEY 没有对应的值，就调用这个方法进行加载
                @Override
                public String load(String s) throws Exception {
                    return "null";
                }
            });
    public  static void setKey(String key,String value){
        localCache.put(key,value);
    }

    public static String getKey(String key){
    String value = null;
        try {
            value = localCache.get(key);
            if ("null".equals(value)){
                return  null;
            }
        return value;
        }catch (Exception e){
        logger.error("localCache get errot",e);
        }
        return null;
    }
}
